/* Safari */
@-webkit-keyframes spin {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loader-overlay {
  -ms-opacity: 0.4;
  background: #999;
  display: block;
  height: 100%;
  left: 0;
  opacity: 0.4;
  position: fixed;
  top: 0;
  vertical-align: middle;
  width: 100%;
  z-index: 100000;
}

.loader-content {
  margin-left: auto;
  margin-top: auto;
  width: 50%;
}

.loader-center {
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);   
  left: 50%;
  display: block;
  position: fixed;
  top: 50%;
  transform: translate(-50%, -55%);
}

.loader {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transform: -webkit-translate(-50%, -50%);
  transform: -moz-translate(-50%, -50%);
  transform: -ms-translate(-50%, -50%);

  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 120px;
  height: 120px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
  margin-left: -60px;
  margin-top: -60px;

  z-index: 1000;
}